What Do You See? It looks like the two students made a pully and attached a can to it. The can makes sounds depending on the length and tension of the string.
What Do You Think? By plucking different "chords" on the string, the sound variates from higher to lower pitches
Inquiring Further Live sound technicians mainly work in the music industry to help out musicians during concerts and other performances. Sound technicians need to take into account the space/venue the artist is performing in, and works with mixing boards to make sure the volume is good. http://education-portal.com/articles/Job_Description_of_a_Live_Sound_Technician.html
Physics Talk
Vibrate: move back and forth rapidly Variable: something that can change or vary during an investigation Pitch: how high or low a note is
Changing the tension changes the pitch
Checking Up 1) When tension is increased, the pitch is heightened 2) When the length is decreased, the pitch is heightened 3) It increased tension and pitch 4) The contact between a drum and a drum stick creates the same kind of sound wave as a string being plucked.
Physics To Go 1A) You can pull harder on the string or add more mass to the end. 1B) The tighter the string, the higher the pitch.
2A) When you push on a fret, you extend the length of the string beyond the point that it vibrates. 2B) The shorter the length the higher the pitch
3A) The length of the string has to be proportional to the tension to keep the pitch constant. 3B) By tightening the string to the same amount that you lengthened it, the pitch would stay the same.
4)
For the pitch to become higher, the length needs to decrease and the tension increase
For the pitch to become lower, both the length and the tension need to decrease
For the pitch to become lower, the length needs to increase and the tension decrease
For the pitch to become lower, both the length and the tension need to increase
5A) When you press down on the fret it changes the length of the string. The shorter the string, the higher the pitch. 5B) When you tighten the strings, the pitch becomes higher.
6A) They can loosen or tighten the strings to change the pitch. 6B) To change how the notes sound 6C) If there is more length and less tension, then the pitch becomes lower.
7A) So the musician can quickly change the length of the strings to variate the pitch. 7B) No, they don't have frets. However, the musician can slide his hand on the strings to change the length 7C) Violinists and guitarists both have places where they need to know where to move their fingers to.
What Do You Think Now?
When a musician wants to change the pitch on his instrument (in this case a guitar) he needs to tighten the strings to increase the tension and therefore increase the pitch.
Section 2
What Do You See A girl is riding a physics wave on the beach with the ocean in the background. This is a metaphor for her riding a real wave.
What Do You Think Water particles move in all directions but the energy of the wave moves in a constant motion towards the shore.
Physics Talk Node: position on a standing wave where there is always destructive interference Antinode: position on a standing wave where there is constructive interference.
1/2(n) x lambda = length
Checking Up 1) A wave is a transfer of energy through a medium. 2) A transverse wave has energy moving horizontally but particles that move vertically. A longitudinal has energy that moves in the same direction 3) A node is a position on a standing wave where there is always destructive interference, whereas an antinode occurs where there is constructive interference.
Physics To Go 1A)
Amplitude: measures distance from equilibrium lines
Frequency: times in one second or the reciprocal of a period
Speed: d / t or wavelength x frequency
Wavelength: from one point on a wave to the exact point on the other
1B)
Amplitude & Wavelength: meters
Frequency: Hertz
Speed: m/s
1C) As frequency increases, wavelength decreases
2A) The waves begin to follow one another more quickly. 2B) It makes the wavelength decrease while the frequency increases and the period quickens 2C) The speed and amplitude remain constant
3) You measure the exact same point on two waves, and then measure the distance between the two 4) You measure how many waves pass that certain point in one second (frequency)
6A) A standing wave allows energy to floe through a medium to produce a sound 6B) 6C) A complete wave length, complete with a trough and crest. It's basically from one node to the next.
7A)
Transverse: vibration of a medium and an energy's flow are perpendicular
Longitudinal: vibration of particles and energy that are parallel
7B) Transverse is when something is moved from side to side in a fluid motion, whereas longitude would be when an object, like a Slinky, is stretched out from both sides and released at the same time.
7C) The wave bounces from one spring to another.
8A) They are proportional because in order to make the wave length shorter you need to increase the frequency. 8B) The wavelength becomes longer when the frequency is decreased
9A)
1 - 10 m
2 - 5 m
3 - 1.66 m
4 - 1.25 m
5 - 1 m
9B) They are each 5 meters divided by the amount of antinodes
10A) 1 antinode = 1/2 wavelength 20 m
10B) frequency = 1 / period frequency = 1/2
10C) v = lambda(f) v = 20(1/2) v = 10 m/s
11A) amp(1) + amp(2) = center amp 3 cm + 2 cm = 5 cm
11B) amp(1) - amp(2) = x 3 cm - 2 cm = 1 cm
12) v = d / t v = 9 / 2.64 v = 3.41 m/s
13A) Nodes 13B) 6 m 13C) 3.5 m
What Do You Think Now? Water waves are transverse because they have an energy that pushes the water to the shore. The wavelengths move in the same direction, even though the water particles move up and down. The water reaches its max. and min. heights at the troughs and crests.
Section 3
What Do You See? The boy is making an instrument with a cup, some string, and a broom. The makeshift instrument seems to be working and playing just as well as the harp used.
What Do You Think? The tighter the string is, the more tension it possesses. This tension allows the string to vibrate faster and produce higher pitches.
Physics Talk Direct Relationship: a relationship in which increasing one variable increases the other variable or decreasing one variable also decreases the other variable Inverse Relationship: a relationship in which decreasing one variable increases the other variable or vice versa.
The length of a string is always half the wavelength of the lowest frequency wave
Pitch and frequency are positively correlated
Checking Up 1) When you decrease the wavelength, more waves need to fill the string and therefore a higher frequency is created. This is shown by f = v / lambda. When the frequency goes up the wavelength goes down, having a negative correlation. 2) They are directly related because the greater the tension is the higher the pitch. Pitch and tension are positively correlated. 3) Greater tension in the string causes displacement from the force and motion. The vibrations from the speed cause a higher pitch 4) L = 1/2(n)(lambda)
What Do You Think Now? The wavelength of a standing wave is correlated to the length of a string. The length of a string is always half the wavelength of the lowest frequency wave, so a string with more tension will have more force pulling on it. The greater force causes greater vibrations, resulting in greater pitch overall.
Section 4
What Do You See? All of the people in the picture are blowing into various wind instruments.
What Do You Think? When you blow into a flute, the tighter you make your lips the higher the sound. The air escapes through various holes in the flute to make specific notes and sounds.
Physics Talk Diffraction: the ability of sound waves to spread out or change direction as they emerge from the opening
A smaller opening produces more diffraction than a large opening
Table of Contents
Section 1
What Do You See?
It looks like the two students made a pully and attached a can to it. The can makes sounds depending on the length and tension of the string.
What Do You Think?
By plucking different "chords" on the string, the sound variates from higher to lower pitches
Inquiring Further
Live sound technicians mainly work in the music industry to help out musicians during concerts and other performances. Sound technicians need to take into account the space/venue the artist is performing in, and works with mixing boards to make sure the volume is good.
http://education-portal.com/articles/Job_Description_of_a_Live_Sound_Technician.html
Physics Talk
Vibrate: move back and forth rapidly
Variable: something that can change or vary during an investigation
Pitch: how high or low a note is
Checking Up
1) When tension is increased, the pitch is heightened
2) When the length is decreased, the pitch is heightened
3) It increased tension and pitch
4) The contact between a drum and a drum stick creates the same kind of sound wave as a string being plucked.
Physics To Go
1A) You can pull harder on the string or add more mass to the end.
1B) The tighter the string, the higher the pitch.
2A) When you push on a fret, you extend the length of the string beyond the point that it vibrates.
2B) The shorter the length the higher the pitch
3A) The length of the string has to be proportional to the tension to keep the pitch constant.
3B) By tightening the string to the same amount that you lengthened it, the pitch would stay the same.
4)
5A) When you press down on the fret it changes the length of the string. The shorter the string, the higher the pitch.
5B) When you tighten the strings, the pitch becomes higher.
6A) They can loosen or tighten the strings to change the pitch.
6B) To change how the notes sound
6C) If there is more length and less tension, then the pitch becomes lower.
7A) So the musician can quickly change the length of the strings to variate the pitch.
7B) No, they don't have frets. However, the musician can slide his hand on the strings to change the length
7C) Violinists and guitarists both have places where they need to know where to move their fingers to.
What Do You Think Now?
When a musician wants to change the pitch on his instrument (in this case a guitar) he needs to tighten the strings to increase the tension and therefore increase the pitch.
Section 2
What Do You See
A girl is riding a physics wave on the beach with the ocean in the background. This is a metaphor for her riding a real wave.
What Do You Think
Water particles move in all directions but the energy of the wave moves in a constant motion towards the shore.
Physics Talk
Node: position on a standing wave where there is always destructive interference
Antinode: position on a standing wave where there is constructive interference.
Checking Up
1) A wave is a transfer of energy through a medium.
2) A transverse wave has energy moving horizontally but particles that move vertically. A longitudinal has energy that moves in the same direction
3) A node is a position on a standing wave where there is always destructive interference, whereas an antinode occurs where there is constructive interference.
Physics To Go
1A)
- Amplitude: measures distance from equilibrium lines
- Frequency: times in one second or the reciprocal of a period
- Speed: d / t or wavelength x frequency
- Wavelength: from one point on a wave to the exact point on the other
1B)- Amplitude & Wavelength: meters
- Frequency: Hertz
- Speed: m/s
1C) As frequency increases, wavelength decreases2A) The waves begin to follow one another more quickly.
2B) It makes the wavelength decrease while the frequency increases and the period quickens
2C) The speed and amplitude remain constant
3) You measure the exact same point on two waves, and then measure the distance between the two
4) You measure how many waves pass that certain point in one second (frequency)
5A) Wavelength: meters
5B) Frequency: Hertz
5C) Speed: m/s
5D) Wavelength(period) = speed
5E) Wavelength(period) = speed (m/s)
6A) A standing wave allows energy to floe through a medium to produce a sound
6B)
6C) A complete wave length, complete with a trough and crest. It's basically from one node to the next.
7A)
7B) Transverse is when something is moved from side to side in a fluid motion, whereas longitude would be when an object, like a Slinky, is stretched out from both sides and released at the same time.
7C) The wave bounces from one spring to another.
8A) They are proportional because in order to make the wave length shorter you need to increase the frequency.
8B) The wavelength becomes longer when the frequency is decreased
9A)
- 1 - 10 m
- 2 - 5 m
- 3 - 1.66 m
- 4 - 1.25 m
- 5 - 1 m
9B) They are each 5 meters divided by the amount of antinodes10A)
1 antinode = 1/2 wavelength
20 m
10B)
frequency = 1 / period
frequency = 1/2
10C)
v = lambda(f)
v = 20(1/2)
v = 10 m/s
11A)
amp(1) + amp(2) = center amp
3 cm + 2 cm = 5 cm
11B)
amp(1) - amp(2) = x
3 cm - 2 cm = 1 cm
12) v = d / t
v = 9 / 2.64
v = 3.41 m/s
13A) Nodes
13B) 6 m
13C) 3.5 m
What Do You Think Now?
Water waves are transverse because they have an energy that pushes the water to the shore. The wavelengths move in the same direction, even though the water particles move up and down. The water reaches its max. and min. heights at the troughs and crests.
Section 3
What Do You See?
The boy is making an instrument with a cup, some string, and a broom. The makeshift instrument seems to be working and playing just as well as the harp used.
What Do You Think?
The tighter the string is, the more tension it possesses. This tension allows the string to vibrate faster and produce higher pitches.
Physics Talk
Direct Relationship: a relationship in which increasing one variable increases the other variable or decreasing one variable also decreases the other variable
Inverse Relationship: a relationship in which decreasing one variable increases the other variable or vice versa.
Checking Up
1) When you decrease the wavelength, more waves need to fill the string and therefore a higher frequency is created. This is shown by f = v / lambda. When the frequency goes up the wavelength goes down, having a negative correlation.
2) They are directly related because the greater the tension is the higher the pitch. Pitch and tension are positively correlated.
3) Greater tension in the string causes displacement from the force and motion. The vibrations from the speed cause a higher pitch
4) L = 1/2(n)(lambda)
What Do You Think Now?
The wavelength of a standing wave is correlated to the length of a string. The length of a string is always half the wavelength of the lowest frequency wave, so a string with more tension will have more force pulling on it. The greater force causes greater vibrations, resulting in greater pitch overall.
Section 4
What Do You See?All of the people in the picture are blowing into various wind instruments.
What Do You Think?
When you blow into a flute, the tighter you make your lips the higher the sound. The air escapes through various holes in the flute to make specific notes and sounds.
Physics Talk
Diffraction: the ability of sound waves to spread out or change direction as they emerge from the opening
Checking Up
Physics To Go
What Do You Think Now?